Survey results like these can be useful for companies deciding how to allocate their marketing budgets across different geographic markets, Belch said. It can also help merchandisers determine what products or services to make available in certain areas.

Still, he warned that some market shares--like Jaguar's, for example, which is 1 percent of the auto market in San Diego and 0 percent in most other cities--are small, making their numbers small and leading to "somewhat tenuous" survey results.

Do you see any rankings that seem odd? Which ones make the most sense, and why? Add your thoughts to the comments below.